package cc.chengheng.controller;


import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

@RestController
public class LoginController {
    @RequestMapping(value = "/login‐success", produces = {"text/plain;charset=utf-8;"})
    public String loginSuccess() {
        return getUsername() + " 登录成功";
    }

    /**
     * 获取当前登陆用户
     * @return
     */
    private String getUsername() {
        String username = null;
        // 当前认证通过的用户身份
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

        // 获取用户的身份
        Object principal = authentication.getPrincipal();
        if (principal == null) {
            username = "匿名";
        }
        if (principal instanceof UserDetails) {
            UserDetails userDetails = (UserDetails) principal;
            username = userDetails.getUsername();
        } else {
            username = principal.toString();
        }

        return username;
    }

    /**
     * 测试资源1
     *
     * @return
     */
    @PreAuthorize("hasAuthority('p1')") // 拥有p1权限才可以访问
    @GetMapping(value = "/r/r1", produces = {"text/plain;charset=UTF-8"})
    public String r1() {
        return getUsername() + " 访问资源1";
    }

    /**
     * 测试资源2
     *
     * @return
     */
    @PreAuthorize("hasAuthority('p2')")
    @GetMapping(value = "/r/r2", produces = {"text/plain;charset=UTF-8"})
    public String r2() {
        return getUsername() + "访问资源2";
    }
}
